The simplicity of the prokaryote bacteria cells can depict the origin of life. It is simply composed of microscopic unit enclosed in a plasma membrane and cell wall. The inside contains a small DNA molecule, ribosomes and cytoplasm (they have no organelles). They have been around for 2 billion years on earth before other organisms evolved from them.
Antibiotics are drugs that are able to fight diseases caused by bacteria. Besides, it is a "golden solution" that can kill harmful bacteria (pathogenic bacteria such as fungi, actinomycetes, ...), has the effect of inhibiting the growth and spread of of these bacteria.
